Update OTX1.6.1 changelog (#3481) #6590

Job	Run time
Code-Quality-Checks	3m 47s
Coverage-Test	12m 32s
Unit-Test-with-Python3.9 / run_tests_in_tox	20m 56s
Integration-Test-py310-ano / run_tests_in_tox	10m 6s
Integration-Test-py310-all / run_tests_in_tox	19m 45s
Integration-Test-py310-act / run_tests_in_tox	10m 57s
Integration-Test-py310-cls / run_tests_in_tox	26m 3s
Integration-Test-py310-iseg / run_tests_in_tox	1h 1m 48s
Integration-Test-py310-seg / run_tests_in_tox	12m 28s
Integration-Test-py310-visprompt / run_tests_in_tox	10m 45s
Integration-Test-py310-det / run_tests_in_tox	41m 0s
	3h 50m 7s

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